Device for laying oitt pipe-flanges



M. E. CLARK.

DEVICE FOR LAYING OUT PIPE FLANGES.

APPLICATION FILED MAI/21. Isla.

'1,3 1 4, 1 84. Patented Aun'. 26, 1919;*f

ATTORNEY 'run cnmmnm PLANUGRM'II co.. wAslllNnTuN. n. c.

M. E. CLARK. DEVICE FOR LAYING OUT PIPE FLANGES.

APPucATloN FILED MAYzl, usla.

1,314,184. x Patented Aug. 26,1919.

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INVENTOR ATTORNEY Tun COLUMBIA PL/Nounwn co.. WASHINGTON. D. c.

MASON" EDWIN CLARK, OF SEATTLE, WASHINGTON.

DEVICE FOR LAYING OUT PIPE-ELAN GES.

Specification of Letters Patent.

Application led May 27, 1918. Serial No. 236,749.

To all whom 'it may concern Be it known that I, MASON EDWIN CLARK, acitizen of the United States, and resident of Seattle, in the county ofKing and State of Washington, have invented certain new and usefulImprovements in Devices for Laying Out Pipe-Flanges, ot which the,tollowing is a clear and exact specification.

rlhis invention relates to improvements in tools or instruments forlocating and marking the centers of holes that are to be drilled in pipeflanges and the object of this i1nprovement is to provide a strong andrelatively simple and easily operated device ot this nature with whichthe holes in pipe flanges may be marked out with great rapidity.

A further and more specific object is to provide a device of this naturethat is constructed so that it will operate with great accuracy and atthe same time is strong enough so that one ot its parts may be struck arelatively hard blow to cause it to make a mark like a punch mark toindicate the center of the hole that is to be drilled.

A still further object is to provide a dcvice of this nature thatembodies novel, efficient and easily operated means for centering thedevice vwithin the central opening in a pipe flange.

The invention consists in the novel construction, adaptation andcombination of parts, as will be more clearly hereinafter described andclaimed.

In the accompanying drawings, Figure 1 is a plan view of a deviceconstructed in accordance with this invention; Fig. 2 is a viewv invertical section substantially fon broken yline 2-2 of' Fig. 1, certainparts being broken away and certain other parts being shown inelevation; Fig. 3 is a view in cross section on broken line 3-#3 of Fig.2 showing the parts as they would appear if the plug that projectsdownwardly into the top end of the hollow shank was removed; Fig. 1 is aview in cross Section on broken line 1--11 of Fig. 2; Fig. 5 is a viewin cross section on broken line 5-5 of Fig. 2; Fig. 6 is a detached viewin perspective of one of the centering devices as it may appear whenextended to fit a pipe flange having a large central openingand Fig. 7is a view in longitudinal .section of a marking tool that is adapted tobe used in connection with this device,

In locating marking the centers ,0f

holes that are to be drilled in pipe flanges when the pitch diameter andnumber of holes required are known it is common practice to plug thecent-ral opening of the flange with a piece of' wood or similarmaterial, find the center of' this plug with a .pair of dividers, thendescribe a circle of the given diameter and then by a cut and try methodto space ofi' the required number of holes. After the centers of theholes are located they are usually marked by an indentation with a prickpunch, a small circle is then described to indicate the circumference ofthe desired hole and five or six prick punch marks are made at spacedintervals around the small circle to guide the driller.

The above method when accurately carried out requires the expenditure ofconsiderable time on each flange.

The device disclosed in this application enables a person to perform thework of laying out the holes on a pipe flange at a great saving of timeas compared to the old method and lis accurate and reliable inoperation.

Like reference numerals designate like parts throughout the severalviews of the accompanying drawings.

Referring to the drawingsthe numeral 10 designates a tubular shank thatis provided near its top end with an annular flange 11 and above theflange with an external thread 12 that is adapted to screw upwardlythrough a plate 13 and through the bottom of a concentrically arrangedshallow dishshaped member 14, the flange 11 engaging with the bottom ofthe plate 13 and serving as a stop.

The member 14C is provided with relatively shallow vertioally'arrangedcylindrical side walls 15 in the top edge of which are provided aplurality of notches 16 that are marked or graduated as shown in Fig. lto indicate the number of holes that are to be drilled in the flange.

Fixedly secured within the top end of the shank 10 is a plug 17 having aconcentric bore to permit the passage of a stem 18 and provided on itstop end with a concentrieally arranged upwardly directed bearing shankor sleeve 20 that is externally threaded at its top end for thereception of a nut 21.

22 is a collar that is journaled on the shank 20 and is connected by apivot 23 with members A24: that are iixedly secured by Patented A110.26, 1919. I

screws or rivets 25 to the inner end of a graduated measuring arm 26,the arrangement being such that the outerend of the measuring arm' maybe lifted up and the arm rotated or turned about the central axis of thedevice.

,Y The arm-26 is substantially T-shape in cross section the horizontalportionhaving the graduations inscribed thereon and the vertical portionbeing adapted to fit snugly within the notches 16.

Slidable on the arm 26 is a marking device 27 that is provided on itsbottom end'with a removable centrally arranged punch member 28 and onits top end 4with a knob 30 that serves as a linger hold and that may bestruck with a heavy instrument, as a mallet,

' to cause thepunch member 28 to make an indentation.

The marking device 27 is` adjustably se- Y cured tothe measuring arm 26by a thumb screw 31 as more'clearly shown in Fig. 5 and such markingdevice is provided with a curved edge 29 thatjis adapted to be set onthe curved graduation on the arm26 that marks the desired diameter. Theedge 29 may be notched `as at.29 to facilitate setting it exactly on thedesired graduation.

'The plate 13 is secured to the member 14 by screws 32 and is providedat intervals with outwardly projecting arms 33 that are Hush vwith thebottom of the plate 13 Vand serve to' support the device in the correctposition onl a pipe liange 34 while itis being centered. f v Y Y Y 'Thecentering devices comprise three arcuate members 35, 36, and 37 that areadapted to move kinto and out ofi the shank 10' through guide slots V38.j Y Y The lower ends ofthe members 35, 36 and 37 areconnected by pivots40 with a disk 4l that is adapted to be moved'vertically in the shank 10by the threaded bottom end 42 of the stem '18 which extendstherethrough.

` The top surface of the disk 41 is recessed as at 43 to facilitate thesecuring of the lower ends of the arcuate arms thereto and the shank V10may be perforated as at 44, see Fig. 4, `to permit the insertion of thepivot screws 40 when the device is assembled.`

YThe bottom end of the plug 17 is slottedv atV three Ypoints around itslperipheral edge as vindicated at 45 to form guides lfor the out-Y wardlyprojecting ends of the centering members 35', 36 and '37.

The centering members V35, 36and 37 are .l disposed and arranged asshown invFigs. 2',

f 3 and '4 so that theymay'bewithdrawn entirelyv within the shank 10'andwhen in such position will not interfere with each other or with" thescrew 42.Y

The centering members are all of` the same length and when the disk,v 41Yis raised by rotating the p screw 42 such members will at all'tim'es beprojected an even distance indentation or flange having `a centralopening that is too large to be reached by the members 35, 36 and 37without the use vof the extensions.

The stem 18 .is provided at points below v the plug 17 and above the nut21 with fixed collars 48 and 49 respectively that serve to preventvertical movement thereof and is further provided on its top end with afixedly mounted hand wheel 50 by which it may be turned. Y

vWhen a pipe ange 34 is to be marked 'out the shank 10 is inserted inthe central openl ing 34 of the flange and' the plate 13 and arms 33 arepermitted to rest on the top of the flange.

The screw 42 is then rotated byy turning the hand wheel 50 toexpand thecentering members.V 35,36 and 37 Y against the inner annularwall of thecentral opening of the flange thereby securing the instrument in acentral location with respect to Vthe pipe flange.

Y The marking device27 is then set sothat the edge 29 registers exactlywith the graduation indicating the desired pitch diameter ofthe holesthat are tobeplaced lin `the notch 16 as shown in Fig. 1 whichconstitutes an Y' initialor starting point.` The Amarking de-V vice isthen struck a blow suiicently hard to cause 'the punch member l28 to.makeY ianV Y punch mark on .the pipe flange at the point where the holeis to be.

The arm 26 is then lifted andsuccessively positioned in they notches 16indicating theV other points that areto be marked and the strikingoperationV repeated: vFor instance' if six holes are to be marked' outon a pitch circle five inches vin diameterl the marking device 27 is setonthe five inch graduation mark, as shown in Fig. 1, and the arm 26 isfirst placed inthe initial or starting notch 16 and struck'wi'th amallet and thenV is successively placedin the notches indicated bythesmall numerals"6 on the top of the' Y Y flange and struck with amallet to mark the-l centers indicated at the'points V51 infFig. 1.

It will be seen from' an inspection Vof Fig. 2 that when the arm 26i'sjin'V a notch 16 and` the point Yof the punchmember 28 is5 resting onthe flange there is a clearance between the. bottom of the notch and thebottom of the vertical flange of the arm 26 so that when the member" 27Y is struck with a` mallet the iso 'Y force of the blowwillnot ytend vtobend the .arm 26.

`It is obvious ythat thisdevice may be made in various, lsizes andithat` any number of notches ldmay-beprovided but it has been `inclusiveon any pitch 'diameter from four to fourteen inches is sufficient t0satisfy all ordinaryV requirements.

'In'Fig 7 Ighave shown a tool forquiekly andeasily-making a number ofindentations or punch marks 52 on the circumferential line 53 of a holethat is to bel bored as indicated in Fig. 1.

This devicel comprises-a body member 54 having an enlarged bottom end 55that is provided with aplurality of idiametrically arranged punchlpoints 56 and having a rounded top end that may be struck with a mallet.

The body-portion 54 is provided with an axial bore 57.1exten`ding fromthe enlarged bottom end inwardly and adapted f for the reception of acentering pin58 that bears against a compression spring 60 and `isprovided with a slot 61 on one side for the rcception of a screw 62 thatlimits the outward movement of the centering pin.

The marks 52 are made byplacingthe point of the pin 58 in `one .of ythepunch marks 51 pressing downwardly until the points 56 rest `on thesurface of the flange 34 and then striking a blow on the rounded top endof the member 54.

It will be understood that changes in the form of construction andarrangement of the various parts of this device may be made within thescope of the following claims.

What I claim and desire to protect by Letters Patent is- 1. A device ofthe class described comprising a shank, means associated with said shankfor centering it within a cylindrical opening, a graduated arm pivotedfor tilting movement and for movement around the axis of said shank, anannular notched fiange supported by said shank for determining theangular position of said arm and a marking device carried by said arm.

2. A device of the class described comprising a shank, means forcentering said shank within a cylindrical opening, a disk concentricallysecured to the top end of said shank, said disk having upwardly project*ing cylindrical sidewalls, there being a plurality of notches in the topedge of said side walls, a graduated measuring arm rotatable about thecentral axis of said shank, and adapted to be positioned within saidnotches, and a marking device movable lengthwise on said measuring arm.

3. A device for laying out holes on a pipe flange comprising a shank,means for centering said shank within a cylindrical opening in said pipefiange, a plate secured on the top end of said shank, outwardlyprojecting arms fixedly connected with said plate and flush withthebottom surface thereof, said arms and said plate being adapted to restupon the top surface of a pipe flange, a cylindrical receptacle securedto said shank above said plate, said cylindrical receptacle havingvertical sidewalls that are provided in their top edge with notchesarranged in graduated relation with respect to each other, a measuringarm pivotally mounted for vertical movement at its inner end androtatable about the axis of said shank in a plane at right anglesthereto, said measuring arm being adapted to be selectively positionedywithin said notches, and a marking device movable lengthwise of saidmeasuring arm.

4. A device for laying out holesona pipe flange comprising a shank,means for centering said shank within the central opening of said pipeflange, supporting means secured to the top end of said shank yandadapted t0 rest upon the top of said .pipe flange, a measuring armpivoted at its inner -end for tilting movement in the plane of the axisof said shank and rotatable about the axis of said shank in a plane atright angles thereto, means for determining the angular positionof saidmeasuring arm, and a marking device movable lengthwise on said measuringarm. i

5. A device for laying out holes on a pipe flange comprising a shank,means for centering said shank within the central opening of a pipeflange, a measuring arm tiltably secured at its inner end to said shankand rotatable about the axis of said shank in a plane at right anglesthereto, a marking device movable lengthwise of said measuring arm, andsupporting means secured to the top end of said shank and adapted torest on the top of a pipe flange, said supporting means having notchestherein for the reception of said measuring arm whereby said measuringarm may be moved through a predetermined angle about said shank.

6. A device for laying out holes on a pipe fiange comprising a shank,means for centering said shank within the central opening of a pipeflange, a measuring arm tiltably secured at its inner end to said shankand rotatable about the axis of said shank in a plane at right anglesthereto, a marking device movable lengthwise of said measuring arm, andsupporting means rigidly connected with the top end of saidshank forengaging with the top side of a pipe flange, the top side of saidsupporting means being graduated with a plurality of notches in whichsaid measuring arm may be selectively placed to space off a desirednumber of equidistant points on a given diameter.

7. A device of the class described comprising a. tubular shank having aplurality of guide slots therein, a graduated measuring arm mounted forrotation about the axis of said shank at the top end thereof, aplurality of arcuate centering members movable into and out of saidshank through said guide slots to center said shank within a cylindricalopening and means for moving said centering members.

8. A device of the class described comprising a tubular shank having aplurality of guide slots therein, a graduated measuring arm tiltablysecured tothe top end of said shank and rotatable about the axis of saidshank in a plane at right angles thereto, a disk movable within saidshank, a threaded stem disposed axially of said shank andeX- tendingthrough said disk for moving the disk vertically within the shank, andthree arcuate centering members all pivoted at their bottom ends to saiddisk and movable into and out of said shank through said guide slots tocenter said shank within a cylindrical opening.

9. A device for marking out pipe flanges comprising a tubular shankhaving a plurality of slots therein, a fixed plug disposed within thetop ends of said shank and having a concentric sleeve that projectsabove the top of said shank, said plug also having a concentricallyarranged bore, a stem disposed within said bore, said stem having athreaded lower end, a hand wheel iXedly secured on the top end of saidstem, a disk threaded on said stem and movable vertically within saidtubular shank in response to rotation of said stem, a plurality ofarcuate centering members pivotally secured at their bottom ends to saiddisk and projecting upwardly and outwardly through said slots in saidshank whereby when said disk is raised within said shank said centeringmembers will' be expanded against the inner walls of the central openingof pipe flange and secure said shank in concentric relation within saidcentral opening, a plate secured to the topk end of said shank and`provided with outwardly projecting arms that are flush with the bottomlsurface thereof, a cylindrical receptacle secured to said plate inconcentric relation to said shank, saidcylindrical receptacle having aplurality of notches in its top edge that are graduated with respect toeach other, a collar rotatably mounted on the upwardly projecting sleeveof said plug, a graduated measuring arm pivotally secured to said Collarwhereby it may be tilted `into and outv of said notchesand rotated aboutsaid sleeve, said measuring arm being adapted to fit within said notcheswhereby its angular position may be determined, and a marking devicemovable lengthwise of said measuring arm.

Signed at Seattle, Washington, this'lQth day of April, 1918.

MASON EnwrN CLARK.

Gopies of this patent may be obtained for ve cents each, by addressingthe Commissioner ofn Patents.

Washington, D. C.

